George guild



(No Model.)

G. GUILD. HYDRAULIC SI'IEAIIING` MACHINE.

(Application led Dec. 4, 1897.)

Patented Aug. 2, |898.

llrn@ rares Arent errent GEORGE GUILD, OF CAMBRIDGE CITY, INDIANA, -ASSIGNOR TO BERTSCII da 4 CO., OF SAME PLACE.

HYDRAULIC SHEARING-IVIACHINE.

SPECIFICATION forming part of Letters Patent No. 608,195, dated August 2, 18918.

Application filed December 4, 1897. Serial No. 660,754. (No model.)

To all whom it may concern: tending across from ram 11 to ram 13 and Be it known that I, GEORGE GUILD, of Camrigidly uniting their cross-heads and serving bridge City, Vayne county, Indiana, have inas the wrist for both of links 14; 16, a rockvented certain new and useful Improvements shaft journaled in the housings over rock- 5 5 5 in Hydraulic shearing-Machines, of which shaft 15 and hereinafter termed the holdthe following is a specification. down rock-shaftthis holddown rock-shaft This invention pertains to improvements being provided near each end with forwardlyin hydraulic shearing-machines; and the iinprojecting arms; 17, links extending downprovements will be readily understood from ward from the just-mentioned arms to hold= 6o xo the following description, takenin connection down-gate 4; 1S, an arm fast uponV holddown with the accompanying drawings, in whichrock-shaft 16 and extending rearwardly; 19, Figure 1 is a perspective View of a hydraulic a hydraulic cylinder, hereinafter termed the shearingmachine embodying `my improveholddown-'cylinder, secured against one of ments Fig. 2, a sectional plan of the cylinthe housings under the rear end of .arm 1S; 65 r 5 ders and water connections thereof; and Fig. 20, the ram of the holddown-cylinder, the 3, a side elevation, part vertical section, of ,same projecting upwardly from the cylinder one of the power-cylinders. and being connected by a link with the rear In the drawings, lindicates the housings, of end of arm 18; 21, inlet water-pipe to holdusual throated type; 2, the table, carrying down-cylinder19 22, water-supply pipe con- 7o zo the lower shear-blade, as usual; 3, the vertinected with pipe 21 and leading from any cally-slidin g gate, carrying the upper shearsuitable source of supply of water under presblade, as usual; 4:, the holddown-gate, sliding sure; 23, a three-way valve disposed between vertically in front of the sheargate 3 and pipes 2l and 22; 24, exhaust-pipe connected serving to press the sheet down to the table with valve 23, so that by :means of the valve 75 25 while being sheared; 5, a rock-shaft j ournaled pipe 21 can be placed in communication either in the housings over and somewhat to the rear with the supply-pipe 22 or the exhaust-pipe of the shear-gate and parallel with the plane 24; 25, a pipe leading from holddown-cylinof the gate; G, a power-lever on shaft 5 just der 9 to power-cylinder 10; 26, a pipe leading withinone of the housings, this lever having from holddown-cylinder 19 `to power-cylinder 8o 3o a rearwardly-projecting arm and having also 12; 27, admission-point into the power-cylinan arm projecting forwardly over the shearders from pipes 25 and 2G, the same being at gate; 7, a link connecting the forward arm the base of the power-cylinders and adapted power-lever G with the shear-gate; 8, a second to be overrun by the arms of the power-cylpower-lever similar to lever 6, but disposed inders as the rams approach the lower ends 85 3 5 against the inner surface of the opposite housof their strokes; 28,*grooves in the periphery ing, this lever having also forwardly and rearof the-lower ends of the rams of the powerwardly projecting arms; D, a link connecting cylinders, the same extendingfrom the lower the forward end of power-lever 8 with the end of the ram up to such height as to still be shear-gate; 10, a power-cylinder secured in communication with inlet-point 27 when V9o 4o against the outer surface of one of the housthe power-arms are in their lowermost posiings at vthe rear of the housing; 11, the ram tions, and 29 the cross-heads on the upper of this cylinder-,the same projecting upwardly ends of the power-rains. from the cylinder through a suitable stuiling- When wat-er under pressure is admitted box; 12, a second power-cylinder similar to under power-rams 11 and 13, the rams are 95 45 cylinder 10, but secured against the outer surforced up and pull upon links 1-1 and rock face of the opposite housing of the machine; power-levers G' and S and cause the forcible 13, the ram of this second power-cylinder; descent of shear-gate 3. Continuous wristl-l, links extending downward from erossbar 15 serves in equalizing the power applied heads on the upper ends of rams 11 and 13 to the two ends of the shear-gate. il The re- 10o 5o into pivotal connection with the rear arms of sistance offered to the descent ofl the shearpower-levers G and S; 15, a long wrist-bar eX- gate is liable to be excessive at one end or the other, and the long wrist is useful in transmitting the effect of either power-cylinder, or of both if -tWo power-cylinders are employed, to each end of the gate.

Water admitted under power-ram 2O causes the rocking of shaft 1G and a downward action of holddown-gate 4L. The supply of water first goes to the holddown-cylinder 19 through pipe 2l and goes from that cylinder to the two power-cylinders, the pressure thus reaching the holddown cylinder first and causing the holddown-gate to go promptly into action and to anticipate the descent of the shear-gate, and when, after the completion of the cutting stroke, the water is exhausted the holddown mechanism first feels the effect of the relief.

When the three-way valve is opened to the exhaust and the pressure thus relieved, the power-rams bcgin to slowly descend, the water in the power-cylinders passing out through liberal openings formed at admission-points 27. Toward the end of the downstroke the speed of descent of the rams becomes accelerated and the rams are liable to knock the bottoms of their cylinders or to arrest the m otions of the parts controlled by them with undesired suddenness; but in the present construction, as illustrated-'in Fig. 3, toward the end of the downstroke of the power-rams the outlet-openin gs from the power-cylinders become gradually closed by the downward overrunning ofthe lower ends of the powerrams until finally the openings are completely overrun, grooves 28, however, continuing to keep the discharge-openings in restricted communication with the cylinderspaces below the power-rams, so that the final exhaust and consequent speed of descent of the rams is comparatively mild; and when the water is admitted to lift the rams it finds admission to the cylinders through grooves 28, the admission being sufficiently liberal to start the rams and give to the shear-gate its initial motion preparatory to begin the cutting.

I claim as my invention-- l. In a hydraulic shearing-machine, the combination, substantially as set forth, with housings, a shear-gate, and a rock-shaft journaled in the housings over the shear-gate, of power-levers on the rock-shaft and having forwardly and rearwardly extending arms, connections between the forward arms of said power-levers and the shear-gate, a wrist-bar linked to the rear arms of both said powerlevers, and a power-cylinder having its bar connected with one end of said Wrist-bar.

2. In a hydraulic shearing-machine, the combination, substantially as set forth, with housings, a shear-gate, and a rock-shaft journaled in the housings over the shear-gate, of power-levers on the rock-shaft and having forwardly and rearwardly extending arms, connections between the forward arms of said power-levers and the shear-gate, a wrist-bar linked to the rear arms of both said power-levers, and a pair of power-cylinders each having an arm connected with one end of said wrist-bar.

3. In a hydraulic shearing-machine, the combination, substantially as set forth, with housings, a shear-gate, and a holddown-gate, of a holddown-cylinder having its ram mechanically connected with said holddowngate, a power-cylinder having its ram mechanically connected with said shear-gate, a pipe leading from said holddown-cylinder to said power-cylinder, and a supply-pipe and exhaust-pipe connected with said holddowncylinder whereby the water operating the power cylinder must enter and exhaust through the holddown-cylinder.

4. In a hydraulic shearing-machine, the combination, substantially as set forth, with housings, a shear-gate, and a holddown-gate, of a holddown-cylinder having its rain mechanically connected with said hoiddown-gate, a pair of power-cylinders having their rams mechanically connected with said shear-gate, pipes leading from said holddown-cylinder to each of said power-cylinders, and a supplypipe and exhaust-pipe connected with said holddown-cylinder, whereby the water operating both said power-cylinders must enter and exhaust through the holddown-cylinder.

5. In a hydraulic shearing-machine, the combination, substantially as set forth, with housings, a shear-gate and a power-cylinder having an inlet-opening near its base, of a ram working in said power-cylinder and mechanically connected with said shear-gate and having its lower end arranged to overrun said inlet-opening and having longitudinal grooves at its lower end.

GEORGE GUILD.

Witnesses:

LYNN E. KEPLER, OsoAaE. HOWARD.

IOO 

